Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the car's computer thinks there's a problem with how much air pressure is being measured in the engine. It's like when you blow up a balloon and can't tell if it's full enough.
The P023E code is triggered when the engine control module (ECM) detects a correlation error between the manifold absolute pressure (MAP) sensor and the turbocharger/supercharger boost sensor B.
The P023E code indicates that the ECM has detected a discrepancy between the readings of the MAP sensor and the turbocharger/supercharger boost sensor B. These sensors are responsible for measuring the air pressure in the intake manifold and the boost pressure from the turbocharger or supercharger. A correlation error suggests that the sensors are not providing consistent or expected readings, which can affect engine performance.
• Check Engine Light is on
• Reduced engine performance
• Poor fuel economy
• Engine hesitation or stalling
• Faulty MAP sensor
• Faulty turbocharger/supercharger boost sensor B
• Wiring issues or poor electrical connections
• Vacuum leaks
• Faulty ECM
MAP Sensor: Manifold Absolute Pressure Sensor, measures air pressure in the intake manifold.
ECM: Engine Control Module, the computer that manages engine functions.
• Use an OBD-II scanner to verify the code.
• Inspect the wiring and connectors for damage or corrosion.
• Check for vacuum leaks in the intake manifold.
• Test the MAP sensor and boost sensor B for proper operation.
• Replace the MAP sensor if faulty.
• Replace the turbocharger/supercharger boost sensor B if faulty.
• Repair or replace damaged wiring or connectors.
• Fix any vacuum leaks found.
• OBD-II scanner
• Multimeter
• Vacuum gauge
• Basic hand tools
$100 - $500
Moderate
• Ford F-150
• Chevrolet Silverado
• Volkswagen Golf
• Regularly inspect and maintain sensors.
• Check for and fix vacuum leaks promptly.
• Ensure good electrical connections.
Sensor Issue
• Do not ignore the Check Engine Light.
• Seek professional help if unsure about repairs.
Check if the vehicle's powertrain warranty covers sensor issues.
This code has become more common with the increased use of turbocharged engines.
Moderate – While the vehicle may still be drivable, performance issues should be addressed to prevent further damage.
Ignoring this code could lead to increased emissions and reduced fuel economy, which may not comply with environmental regulations.
• Engine running
• Vehicle at operating temperature
The MAP sensor is typically located on the intake manifold, while the boost sensor B is located near the turbocharger or supercharger.
Q: Can I drive with a P023E code?
A: While you may be able to drive with this code, it's best to address it soon to avoid further engine issues.
Q: How do I clear a P023E code?
A: After repairs, use an OBD-II scanner to clear the code. If the issue is fixed, it should not return.
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